478321 has 2 divisors, whose sum is σ = 478322. Its totient is φ = 478320.

The previous prime is 478273. The next prime is 478339. The reversal of 478321 is 123874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474721 + 3600 = 689^2 + 60^2 .

It is a cyclic number.

It is not a de Polignac number, because 478321 - 2⁹ = 477809 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (478351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239160 + 239161.

It is an arithmetic number, because the mean of its divisors is an integer number (239161).

2⁴⁷⁸³²¹ is an apocalyptic number.

It is an amenable number.

478321 is a deficient number, since it is larger than the sum of its proper divisors (1).

478321 is an equidigital number, since it uses as much as digits as its factorization.

478321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 25.

The square root of 478321 is about 691.6075476743. The cubic root of 478321 is about 78.2059536330.

The spelling of 478321 in words is "four hundred seventy-eight thousand, three hundred twenty-one".